Apparatus for tempering tools and the like



' April 6 1926. 1,579,866

E. E. JACOBS ET AL APPARATUS FOR TEMPERING TOOLS AND THE LIKE Fileci Sept. 11, 1924 2 Sheets-Sheet l WlTN ESSES INVENTOR BY 17 m 26 ATTORNEYS April 6 1926.

E. E. JACOBS ET AL APPARATUS FOR TEMPERING TOOLS AND THE LIKE Filed Sept. 11, 1924 2 Sheets-Sheet 2 JNVENTOR )QAK/acoes,

ATTORNEYS Patented Apr. 6, 1926.

UNITED STATES 1,579,866 PATENT OFFICE.

ERNEST ELLERY JACOBS AND MARSH KABNES, OF WEST FRANKFORT, ILLINOIS.

APPARATUS FOR TEMPERING TOOLS AND THE LIKE.

Application filed September 11, 1924. Serial No. 737,162.

To all whom it may concern:

Be it known that we, Emvnsr E. James and Mansn Kaaxns, citizens of the United States, and residents of lVest Frankfort, in the county of Franklin and State of Illinois, have invented certain new and useful Improvements in Apparatus for Tempering Tools and the like, of which the following is a specification.

This invention relates in general to an apparatus especially designed for use in the tempering or hardening of coal cutting machine bits, chisels and similar tools.

The object of the invention is the provision of an apparatus of this character which serves to effect the tempering of the tools automatically after the same have been placed in the apparatus, the apparatus serving to carry the tools through the water, oil or other tempering solution employed at the proper speed and in such a manner as to bring about the desired tempering or hardening of the proper part of the tool, the tools after the tempering operation being de livered to a solution wherein the requisite temper of the proper portion of the tool is maintained while all portions of the tool except the part that has been tempered is permitted to cool gradually whereby to remain or to be rendered soft, tough and inalleable.

A further object is the provision of an apparatus of this character and having the advantages and capacities enumerated hereinabove and which is also of simple and durable construction, reliable and effective in operation, adapted to handle a large number of tools in a speedy and efficient manner, and easy and comparatively inexpensive to manufacture and maintain.

Other objects and advantages reside in certain novel features of the construction, arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification and in which:

Figure 1 is a view in side elevation of one embodiment of the invention,

Figure 2 is a plan view of the embodiment illustrated in Figure 1,

Figure 3 is a view in longitudinal, central vertical section of the embodiment shown in Figures 1 and 2, parts being shown in elevation for the sake of illustration,

Figure f is a fragmentary, detail view in top plan of a portion of the endless chain carrier,

Figure 5 is a detail view in vertical cross section of the pan containing the tempering solution, and

Figure 6 illustrates a modified form of drive mechanism for the endless carrier.

Referring to the drawings wherein for the sake of illustration is shown one embodin'ient of the invention and more particularly to Figures 1 to 5 inclusive, the numeral 10 designates generally a frame which may be constructed in any suitable manner but which in the embodiment illustrated i made up of angle iron and includes legs 11, longitudinal side bars 12 and transversely 01c tending cud bars 13, the legs, the side bars and the end bars being riveted or otherwise suitably fastened together.

A pan 15 which provides a container for a tempering solution such as oil, ater or any approved substance or composition in solution,is supported on the frame and preferably on one of the side bars 12 thereof as indicated at 16. The pan 15 consists of an elongated rectangular structure having its bottom, side and ends closed and having its top open. The end walls of the pan. are cut away slightly adjacent their tops as indicated at 17 in Figure Means is provided for supplying a tempering liquid to the pan 15 at one end thereof and they comprise a tank or reservoir 18 having a valved outlet 19 and a delivery pipe 20 which supplies the tempering solution through the open top of the pan 15 to one end of the pan. At the end of the pan opposite that at which the tempering solution is supplied a discharge pipe 21 is con nected and leads to the point at which it is desired to deliver the used tcn'ipering liquid. The discharge pipe 21 is connected to the pan at the point at which it is desired to maintain a level of tempering liquid.

An endless carrier designated generally at 25 is mounted on the frame 10 and comprises an endless sprocket chain 26 trained over sprockets 27 and 28 fixed on axles 29 and 30. The axle 30 is journalled in fixed bearings provided in the side bars 12 adjacent one end of the frame 10 and the axle 29 is journalled in adjustable bearing blocks 31 fitted in slidcways 32 provided in the side bars 12 of the frame and controlled by adjusting screws 33 operatively engaged with'threaded bearings 3 1 fined on the side bars 12. By adjusting the screws 33 the desired tension may be placed on the endless chain 26. ()bviously any suitable type of adjustable bearings may be provided for the axle 29 in lieu of those illustrated.

A plurality of tool carrying buckets 35 are carried by the endless chain 26. The buckets 35 are of rectangular form and have their sides, ends and bottoms closed except for the provision of suitable openings 36 to admit of the passage of the tempering solution into the interior of the buckets during the travel of the same through the pan containing the tempering solution. The tops of the buckets are open to permit of the ready insertion and removal of the tools to be tempered.

For the purpose of mounting the buckets 35 on the endless chain 26, certain of the links of the chain have attached thereto laterally extending studs 37, there. being one such stud 37 for each bucket 35. Each bucket 35 is provided with a pivot bearing 38 on one of its end walls adjacent the upper part 01"" the bucket and each pivot bearing 38 receives the stud 37 provided for the bucket on which the pivot bearing is formed. Cotter pins 39 may be provided for the purpose of preventing accidental endwise displacement of the buckets from the studs. With this arrangement the buckets. 35 are supported on the endless chain in such manner as l to,

tend to hang downfrom the chain at an angle with respect to the vertical as illustrated in conjunction with the buckets. on the lower run of the chain in Figures 1 and 3. WVith the buckets supported in this manner they are free toassume an upright tool receiving or containing position during their travel through the pan 15 and are also adapted to be tilted and inverted to dump the tools into the cooling vat after the tempering operation.

Driving mechanism is provided for the endless carrier and comprises a drive shaft 10 actuated from any suitable source of power and serving to turn the axle 30 on which the sprocket 28 is fixed through suitable speed reduction gearing. The speed reduction gearing may comprise a relatively small pinion 41 fixed to the drive shaft a0 andmeshing with a relatively large gear wheel 42 fixed to the aide 3O.v In lieu of the pinion 4:1 and gear wheel 42 a worm 43 and worm wheel 14 may be employed.

With the apparatus described the tools to be tempered which may be coal cutting machine bits, chisels or the like are placed in the buckets 35 on the upper run of the end less chain just after these buckets pass over the axle 29 and into the pan 15. The parts of the tools tobe hardenedor tempered occupy the lowermost part of the buckets and as the buckets pass through the pan 15 the tempering liquid flows into the lower ends or bottoms of the buckets so that only the portion. of each tool to be tempered is immersed in the tempering liquid. The endless chain is driven from the drive shaft 40 through the speed reduction gearing so that the upper run of the chain moves to the right as viewed in Figures 1 and 3 and causes the buckets with the tools therein to pass from the end of the pan 15 at which the tempering liquid is supplied to the end at which the tempering liquid is discharged. The buckets move through the pan 15 at the speed requisite to bring about proper tempering of the portions of the tools to be hardened. After the buckets have passed through the tempering pan 15 they are tilted overthe axle 30 as shown in Figures 1 and 3 and the tools that have been tempered are dumped into a vat 45. The vat 45 contains liquid which holds the proper temper in the points or the bit, chisels or other tools or in the parts thereof in which a temper has been set up and at the same time the remaining portions of the tools are permitted to cool slowly to preserve such remaining portions in a soft, tough and malleable condition.

We claim:

1. In a machine of the character described, a container, means for supplying a tempering liquid to the container, a carrier mounted in proximity to the container, buckets mounted on the carrier and moved through the container by said carrier, said buckets being adapted to receive the articles to be tempered and having openings admitting of the inflow of the tempering liquid there into when moved through the container.

2. In a machine of the character described, a container for a tempering liquid, a carrier mounted in proximity to the container, buckets mounted on the carrier and moved through the container by said carrier while partially immersed in the tempering liquid thereof, said buckets beingadapted to re* ceive the articles to be tempered.

3. In amachine of the. character described, a frame, apan' mounted on the frame, means for supplying the pan with a tempering liq.- uid, an endless carrier mountedon the frame and having arun overlying the pan, buckets mounted on the endless carrier and moved through the pan, said buckets being designed to receive the articles to be tempered and to immerse the portions thereof to be tempered inthe tempering liquid when the buckets move through the pan and driving mechanism for said endless carrier.

4. In a machine of the character described,

mounted on the carrier and adapted to pass through the pan, said buckets being designed to receive the articles to be tempered.

5. In a machine of the character described, a frame, a pan mounted on the frame, means for supplying the pan with a tempering liquid, an endless carrier mounted on the frame and having a run overlying the pan, buckets pivotally mounted on the endless carrier and moved through the pan by said carrier, said buckets being designed to receive the articles to be tempered, means for tilting the buckets to dump the articles therefrom after the buckets have passed through the pan and a vat for receiving the tools as they are dumped from the buckets.

6. In a machine of the character described, a frame, a pan mounted on the frame and adapted to contain a tempering liquid, a carrier mounted on the frame and including sprocket wheels, an endless chain trained over the sprocket wheels, laterally extending studs carried by certain of the links of the chain and buckets having pivot bearings at one end and adjacent their upper portions, said bearings receiving the studs to pivotally mount the buckets on the endless chain, said buckets being designed to receive the articles to be tempered, one run of the chain overlying the pan in close proximity thereto whereby the buckets pass through the pan when the chain is moved.

7. An apparatus for tempering coal cutting machine bits comprising a frame, a shal low open top pan mounted on the frame and containing tempering liquid, sprocket wheels mounted on the frame, a sprocket chain trained over the sprocket wheels and having a run overlying the pan, buckets pivotally mounted on the sprocket chain and having open tops and perforations in their lower portions, the buckets of the upper run of the chain sliding along the bottom of the pan whereby the buckets are maintained in upright position while passing through the pan, the lower portions of the buckets being filled with the liquid of the pan so that the bits supported in the buckets have their points tempered.

8. A machine for tempering coal cutting machine bits comprising a frame, a shallow pan mounted on the frame, an endless carrier having a run extending along and over the pan, a plurality of buckets pivotally mounted on the endless carrier, each having sides, ends and a bottom and an open top, the bottoms of the buckets on the upper run of the carrier slidably engaging the pan whereby the buckets are maintained in an upright position when passing through the pan, the lower portions of the buckets having perforations below the level of the liquid in the pans to permit the liquid to rise within the buckets in the pan to a definite level whereby the points of the bits in the buckets are tempered.

ERNEST ELLERY JACOBS. MARSH KARNES. 

